Case for rotary water meters



` (No Model.) 2 sheets-,sheet 1.

LAETNASE. CASE EOE EOTAEY WATER METERS.

No. 408.507.` Patentd Aug. 6, 1889'. r

"M01/7151457173 EU'GRO 71;'

(No Model.) 2 sheets-sheen 2.. LH.NASH. CASE EUR ROTARY WATER METERS.

No. 408,50'7l Patented Aug. 6, 1889.

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UNITED STATES ATENT OFFICE.

LEVIS HALLOCK NASH, OF BROOKLYN, ASSIGNOR* TO THE NATIONAL METERCOMPANY, OF NEV YORK, N. Y.

CASE FOR ROTARY WATER-METERS.

SPECIFICATION forming part of Letters Patent No. 408,507', dated August6, 1889.

Application filed January 13, 1886. Serial No. 188,462. (No model.)

To all whom t may concern:

Bgit known that I, LEWIS HALLOCK NASH, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful 11nprovemen ts in W'aterflileters, of which thefollowing is a specification.

My presentinvention consists of improvements in water-meters, and isillustrated in the io drawings forming part of this specification asapplied to a meter now wellV known'in the trade as the Crown, which isfully described in patents granted to me January 21 and 28, 1879, Nos.211,582 and 211,769, and July 17, 1883, No. 281,390. Said patent grantedJ anuary 21, 1879, was reissued February 8, 1887, No. 10,806 ofreissues. My presentinvention is, however, obviously applicable to otherforms of meters than those described in said patents.

My improvement is directed to the construction of the chamber-Wall of awater-m eter, whereby it is rendered more durable and easily repairedwhen such wall or case becomes worn from the friction of the piston.Forthis purpose I apply to the bearing-surface of the case, or to someportions of it, a facing of hard metal of the desired form,and abacking, preferably of soft metal, introduced as a filling to lock thehard-metal facings to the wall, whereby the smooth hard surface of themetal of the piston (made preferably of hard rubber) permits an easymovement to the piston. This construction gives the advantage of makingit possible to remove and replace the worn metal facingsV by new ones,and in this particular the meter can be repaired so as to make it asgood as new.

In my patent aforesaid of July 17, 1883, the joint-forming bearings ofthe case-wall are provided with a soft-metal facing cast directly uponthe wall projections, so as to be locked therewith, whereas in mypresent improvement, as embodied in the form illustrated in thedrawings, I use a soft-metal filling or backing of cementing substanceas the means of securing ahard-metal facing for the case projections,and find the meter to be thereby made more durable at the points subjectto wear.

In the accompanying d1 awi'n gs l have shown so much of the crownwater-meter illustrates the joint-forming construction of thecase-wallprojections, in which Figure 1 shows the interior of themeter-case in top view, and Fig. 2 a horizontal section of the same,with the piston in the relation it occupies in dividing the chamber intoreceiving and discharging measuring-spaces; and Fig. 3 shows an enlargedhorizontal sectional detail of a 6o portion of the case and one of itswall-bear ing projections provided with my improvement. Fig. 4 is avertical sectional view of the meter, taken through line x a: of Fig. 1.Fig. 5 shows the inner side of the hard-metal 65 facing of theprojection; Fig. 6, its top edge, and Fig. 7 its bottom edge.

Referring to Figs. 2, 3,and 4,it will be seen that the case-wall isformed with proj ections f, which are at equal distances apart aroundthe 7o chamber, and are of such form, dovetail or otherwise, as to makea lock for a soft-metal filling or cement backing e, which in turn formsa lock for a hard-metal facing formed to suit the form of the pistonprojections and recesses, as shown. I prefer to use a soft-metalfilling, because when appliedin a molten condition it hardens withperfect adhesion to the walls of the case and of the facing.

The hard-metal facings shown are of a hol- 8o low form with a convexpart a, which terminates in side wings a a', having faces curvedparallel with the circle of the inner wall of the case-chamber, so as tosuit the movement of the piston, while the inner hollowside of thefacing is of such shape as to forni locks b at two or more points withthe soft-metal backing. This soft-metal backing not only forms a Iillingfor thehollow convex part a of the facing, but forms a seat for the 9owings of the facing, so that the locking-points b a2 of the facing standinward atthe opposite sides of the dovetail case projections, while theends of the latter stand into the hollows of the hard-metal facings, andthereby form a very eifective securement for the latter. While thesoft-metal filling is locked to the chamber-wallprojections, as stated,they are also fastened thereto by being lapped over and under the endsof said projections, as Ioo shown in Fig. 4.

The hard-metal fasings maybe applied and secured in any suitable manner.They may, for instance, be set and held within the caseehamber inposition to be permanently ixed thereto by means of a suitable corecentered in said chamber, there beinga space between each facing and theprojection to receive the soft-metal filling, which is poured into saidspaces in a molten condition; but as such apparatus and method ofmanufacture are made the subject of a separate application by me, iledof even date herewith under Serial No. 188,463, a moreparticulardescription thereof is deemed unnecessary here.

I prefer to cast the chamber-forming case A integral with the interiorwall projections, as shown, and subsequently complete the joint-formingbearings, as stated; but they may be cast separately, if desired.

I claiml. A water-meter case formed of a series of alternate projectionsand recesses having the bearing-surfaces of its chamber-wall formed ofhard metal, and a backing of cementing metal or material,substantiallyas described.

2. Awater-meter case formed of a series of alternate projections andrecesses, having the bearing-surfaces of its chambei-zvalls formed ofhard-metal facing, a backing of cementing metal or material, andwall-locks, substantially as described.

3. In a water-1neter,thc combination of an inclosing-case, separated andisolated bearing-surfaces formed of hard metal, and a cementing metal ormaterial uniting,r said hardmetal bearing-surfaces and case,substantially as described.

4. In a water-meter, the combination of an inolosing-case, separate andisolated bearingsurfaces formed of hard metal, and a cementing metal ormaterial uniting and locking to said metal bearing-surfaces and case,substantially as described.

5. The water-meter case formed withinner wall dovetail projections, incombination with a bearing-surface of hard metal, and a cementingmaterial cast over the wall projections and locked with said hard-metalfacings, substantially as described.

6. The eo1nbination,with the chamber-'forming body cast in one piece, ofinterior chamber-wall proj ect-ions formed of hard-metal facings, and abacking of cementing substance, substantially as described.

7 In a water-meter, the combination of thc piston having circumferentialprojections, with a chai'nber-forming,r case having wall projections ofsoft metal, and a facingof hard metal permanently fastened thereto,substantially as described. y

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

LEWIS IIALLOCK NASH.

Witnesses:

1I. NV. BRINCKERHOFF, XVILLIAM C. \VEs'rERVEL'r.

